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2005 Chevrolet 6.6L Duramax LLY
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Description
We get a lot of calls asking, "What do I need to do to my truck to attain a certain horsepower level?" If you've been wondering the same, below are various "recipes" of parts that are needed to reach certain power levels along with any companion parts that you'll need to ensure the overall drivability and integrity of your truck. For example, you could grab the highest setting on your programmer to make 500HP on a dyno run but for longevity sake, you would be better off with a set of 50HP Injectors and a lower setting on the tuner. Or we will recommend an upgraded lift (fuel) pump once you've reached a power level where we have found it to be necessary. We are going to mention a lot of specific products, and these are products that we prefer through our experience. There are, of course, many other options available that can get the job done, as well.

Bear in mind that even though Dodge says your truck is 350HP, they are quoting flywheel horsepower, not rear wheel horsepower. On a dyno, the actual rear wheel horsepower for these trucks is about 310HP. Please don't get sucked into the trap of adding all of the manufacturer stated horsepower gains for the individual products together to estimate your horsepower. This will only lead to disappointment! There is typically a substantial amount of overlap when combining products, but this is a necessary evil.


400 Horsepower
  • S&B Cold Air Intake
  • Smarty Touch Programmer
  • Diamond Eye 5" DPF Back Single Outlet Exhaust System
  • BD Throttle Sensitivity Booster
Recommended Drivetrain Upgrades
  • Automatic: BD Deep Sump Transmission Pan, BD PressureLoc Line Pressure Booster Kit
  • Manual: South Bend Heavy Duty Organic Clutch
500 Horsepower
  • S&B Cold Air Intake
  • Smarty Touch Programmer
  • MBRP DPF Back Single Outlet Exhaust Kit
  • BD Power Screamer HE351VE Turbo
  • BD Power 2-Piece 6.7L Exhaust Manifold
  • BD Power Common Rail Fuel Plug
  • FASS Titanium Lift Pump
  • BD Power Fuel Distribution Block
  • ARP Head Studs
Recommended Drivetrain Upgrades
  • Automatic: BD Deep Sump Transmission Pan, BD Protect68 Transmission Pressure Control Kit, BD Torque Converter
  • Manual: South Bend Street Dual Disc Clutch
600 Horsepower
  • S&B Cold Air Intake
  • Smarty Touch Programmer
  • MBRP DPF Back Single Outlet Exhaust System
  • BD Power Screamer HE351VE Turbo
  • FASS Titanium Lift Pump
  • BD Power Fuel Distribution Block
  • ARP Head Studs
  • ATS PRV Block Off
  • AFE Intake Manifold
  • BD Intake Plenum
  • Fleece Powerflo 750 10mm Stroker CP3 Injection Pump
  • Dynomite Diesel 50HP Injector Set
  • BD Power Common Rail Fuel Plug
  • BD Power 2-Piece 6.7L Exhaust Manifold
Recommended Drivetrain Upgrades
  • Automatic: BD Performance Transmission W/Billet Input Shaft, BD Triple Torque Converter, BD Power Black FleX-Plate
  • Manual: South Bend Street Dual Disc Clutch